화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.99, 326-333, July, 2021
DOI10.1016/j.jiec.2021.04.043  Export Citation
Effects of methanesulfonic acid on electrolyte for vanadium redox flow batteries
Gunha Kim, Youngkwon Kim1, †, Taeeun Yim2, †, and Kyungjung Kwon†
  • Department of Energy & Mineral Resources Engineering, Sejong University, Seoul 05006, Republic of Korea
  • 1Advanced Batteries Research Center, Korea Electronics Technology Institute, Gyunggi-do 13509, Republic of Korea
  • 2Department of Chemisty, Incheon National University, Incheon 22012, Republic of Korea
E-mail:, ,
Methanesulfonic acid (MSA) is investigated as an additive for improving the thermal stability and electrochemical property of the vanadium redox flow battery (VRFB) electrolyte. The effect of MSA on the thermal stability of the electrolyte is estimated by a storage test, inductively coupled plasma mass spectrometry, and ultraviolet-visible spectrometry. Thermal stability tests show that MSA delays the formation of precipitates. The precipitates formed from the electrolyte are analyzed by X-ray diffraction, scanning electron microscopy, and energy-dispersive spectroscopy. The precipitates gained from the V(II) electrolyte at -5 °C and the V(V) electrolyte at 40 °C have different physicochemical properties. The influence of MSA on the electrochemical property is examined by cyclic voltammetry, linear polarization, and electrochemical impedance spectroscopy. According to the electrochemical analysis, MSA enhances the diffusion of the V(III) and V(IV) ions and the redox reaction rate of the V ions. Additionally, nuclear magnetic resonance analysis is performed to understand the positive effect of MSA on the electrolyte. A VRFB full cell employing the electrolyte with MSA shows enhanced energy efficiency as well as high energy density by improving electrolyte utilization.
Keywords:Redox flow battery;Additive;Electrolyte;Methanesulfonic acid;Electrochemical performance
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